Hi all,
When configuring Asterisk with an ISDN card, it will at one point
become necessary to select the LBO (Line Build-Out) value. This is an
integer (0-7) that is determined by the length of the cable and is
selected from the following table. Many of us are familiar with it:
CSU (dB) DSX-1 (feet)
-------------------------------
0 0 0?133
1 133?266
2 266?399
3 399?533
4 533?655
5 -7.5
6 -15
7 -22.5
The value selected should almost always be zero. However, if the cable
is of a significant length, another value must be selected, but which
one? There are two columns: CSU and DSX-1. When is it appropriate to
use the one or the other to determine the correct LBO value?
Thanks,
Jaap
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